Monday, March27, 2017 L-36.com


Marine Weather and Tides
Ponderay, ID

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:31AMSunset 7:12PM Monday March 27, 2017 7:23 PM PDT (02:23 UTC) Moonrise 6:39AMMoonset 6:53PM Illumination 0% Phase: New Moon; Moon at 1 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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7 Day Forecast for Marine Location Near Ponderay, ID
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location: 48.36, -116.55     debug


Area Discussion for - Spokane, WA
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Fxus66 kotx 272329
afdotx
area forecast discussion
national weather service spokane wa
429 pm pdt Mon mar 27 2017

Synopsis
Evening showers will taper off after sunset tonight. After a
short break in the weather tonight another round of widespread
moderate precipitation will arrive Tuesday night and last until
early Thursday. Friday will bring a dry break period before more
unsettled weather for next weekend.

Discussion
Tonight and Tuesday... A fairly quiet interregnum in the active and
wet weather pattern is enveloping the region. Afternoon scattered
showers concentrated mainly over the eastern basin and idaho
panhandle will minor out as the Sun sets leading to a quiet and
largely clear overnight period... Although some high thin cirrus
may wander in late tonight. Overnight low temperatures will be
chilly as the clearing conditions tonight allow radiational
cooling. Some pockets of early morning fog are possible in
protected valleys and near river beds. The moist boundary layer
and weak upslope winds over the eastern basin may promote some
morning low clouds by dawn Tuesday.

On Tuesday the next round of wet weather will take aim with
satellite indicating a deep pacific moisture feed aiming at the
northwest coast this afternoon. Clouds will quickly increase and
thicken Tuesday morning... And light rain and high mountain snow
will probably begin over the northern zones by mid morning and
spread southward during the afternoon hours as a mid level warm
front develops and allows enhancement of the increasing moisture
feed. This will only be an initial shot of very light rain... Only
a couple hundredths of an inch for most locations with the deep
basin remaining dry. /fugazzi
Tuesday night through Wednesday night... Our next system is set to
impact the region with widespread precipitation during this
period. The warm front will continue to develop over the region
Tuesday night and Wednesday providing a broad area of isentropic
upglide. An atmospheric river will also be pointed into the region
providing pwats of 0.7-0.9, or well into the 90th percentile.

This combination will lead to widespread rain across the area with
snow generally above 4-5k feet. By Wednesday night and into
Thursday morning, the best moisture fetch begins to sink to the
south and a cold front will sweep through the area. This will
focus the best chances for continuing precipitation over the
central idaho panhandle and far southeast washington.

Precipitation totals thru Wednesday night look pretty healthy,
especially over far eastern washington and the idaho panhandle. In
general, look for 0.3 to 0.6 across the eastern 1/4th of
washington, 0.5 to 0.75 across the idaho panhandle valleys with
potentially over an inch of liquid in the mountains. The deep
basin and wenatchee area will probably see the lightest totals as
the isentropic lift looks weakest in this area. The immediate
cascade crest will likely see liquid amounts in the 1 to 2 inch
range with some of that being tied up as snowfall in the higher
elevations.

Impacts: the additional rainfall will likely continue to aggravate
ongoing flooding issues. At this time, the hydrographs for main
stem rivers show some response, but don't deviate much from their
general ongoing trends. Smaller streams and rivers, such as the
little spokane river at dartford and paradise creek at moscow,
will likely react with rises and low-land and lake flooding will
continue to be an issue. The other area of concern will be the
continued risk of mud and landslides in steeper terrain as the
soils are still very saturated, especially across far eastern
washington and the idaho panhandle. /kalin
Thursday through Monday: the active weather will wane a bit, although
more unsettled weather is still possible for the weekend and into
early next week. By the Thursday, the moist weather system exits
and precipitation tapers off as an upper trough moves into the
pacific northwest. This will bring cooler air aloft, more
instability and the chance for afternoon to evening convection
especially across southeast washington and north idaho for
Thursday. Showers should dissipate Thursday night as an upper
level ridge builds into the region. Low level moisture will linger
with light winds northerly winds which could lead to the
potential for patchy fog in the northern valleys late Thursday
nigh into Friday morning. Friday should be a dry day under high
pressure.

For the weekend and beyond, model differences persist in the timing
of the features while forecast confidence lowers. These issues
include the strength of this upper level ridge and the westerly
flow in the pacific and what form it takes to break down the
ridge. The ECMWF is a bit more aggressive and faster solution,
bringing a strong pacific jet and a more consolidated shortwave
into the region by Saturday, while the GFS and canadian are slower
with a more amplified pacific pattern and shows a trough digging
through the region on Sunday. It's difficult to pin down any model
consensus. At this time, will trend to a climatology forecast and
a compromise of the solutions, keeping a mention of showers for
each day. Meanwhile, temperatures should be trending toward normal
for the start of april. /rfox

Aviation
00z tafs: cold and conditionally unstable airmass over the
aviation area allowing surface based scattered showers with a few
isolated thunderstorms of the weak and short lived pulse variety
to linger a bit and diminish in intensity with loss of peak
heating and majority of it should be finished by 3z Tuesday. Low
level southerly flow coupled with the leftover light moisture will
allow for some low level ifr stratus to form overnight and into
Tuesday morning. This stratus expected to break up/raise later
Tuesday morning. Next incoming weather system focuses a southwest
to northeast flow of moisture into the area tomorrow allowing for
clouds to invade the sky from the west and southwest and thicken
and lower as they do. Some light rain may occur during this
process Tuesday afternoon with ceilings and visibilities possibly
MVFR at times. /pelatti

Preliminary point temps/pops
Spokane 35 49 40 51 40 52 / 20 40 70 100 60 40
coeur d'alene 35 46 37 49 39 51 / 30 50 70 100 80 50
pullman 36 49 40 51 41 50 / 30 30 40 100 80 70
lewiston 38 54 42 56 43 54 / 10 20 20 80 80 70
colville 32 47 36 48 37 53 / 20 50 80 100 50 30
sandpoint 33 45 34 47 35 50 / 20 60 70 100 80 40
kellogg 33 44 35 46 37 46 / 40 50 50 100 90 80
moses lake 38 57 43 58 41 59 / 0 10 40 100 20 10
wenatchee 37 53 39 54 38 58 / 10 10 60 90 20 10
omak 35 50 39 52 37 58 / 10 20 70 100 20 10

Otx watches/warnings/advisories
Id... None.

Wa... None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sandpoint, Sandpoint Airport, ID4 mi49 minNE 410.00 miMostly Cloudy46°F35°F66%1017.9 hPa

Wind History from SZT (wind in knots)
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Last 24hrE3N4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS5S3SW7SW7SW7SW5SW5SW3S8S8
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE3NE8NE7N6N4N5N4N6NE7NE4SE4Calm
2 days agoSW3S4S4S5S4S4CalmS4S4S5S4S3S3SW4SW3SW10W8W8S6W14
G22
SW7SW5S5S4

Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Spokane, WA (22,6,7,8)
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Ground Weather Radar Station Spokane, WA
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.